powerpc/pseries: Fix scv instruction crash with kexec (Linux Linux)

CVE-2024-42230
MEDIUM 4.4

En bref

Source
NVD
EPSS
EPSS 0.20 % · centile 10 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Fix scv instruction crash with kexec kexec on pseries disables AIL (reloc_on_exc), required for scv instruction support, before other CPUs have been shut down. This means they can execute scv instructions after AIL is disabled, which causes an interrupt at an unexpected entry location that crashes the kernel. Change the kexec sequence to disable AIL after other CPUs have been brought down. As a refresher, the real-mode scv interrupt vector is 0x17000, and the fixed-location head code probably couldn't easily deal with implementing such high addresses so it was just decided not to support that interrupt at all.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 7fa95f9adaee7e5cbb195d3359741120829e488b < c550679d604798d9fed8a5b2bb5693448a25407c ; affected 7fa95f9adaee7e5cbb195d3359741120829e488b < d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5 ; affected 7fa95f9adaee7e5cbb195d3359741120829e488b < 8c6506616386ce37e59b2745fc481c6713fae4f3 ; affected 7fa95f9adaee7e5cbb195d3359741120829e488b < 21a741eb75f80397e5f7d3739e24d7d75e619011
Linux · Linuxaffected 5.9 ; unaffected 0 < 5.9 ; unaffected 6.1.98 ≤ 6.1.* ; unaffected 6.6.39 ≤ 6.6.* ; unaffected 6.9.9 ≤ 6.9.* ; unaffected 6.10 ≤ *

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD